Add 'archived' column to the 3 reply_to models

Added a new boolean column, `archived`,  with a default of False to the
three models which are used to specify the 'reply to' address for
notifications:
 * ServiceEmailReplyTo
 * ServiceSmsSender
 * ServiceLetterContact

tests/app/dao/test_service_email_reply_to_dao.py

@@ -35,6 +35,7 @@ def test_add_reply_to_email_address_for_service_creates_first_email_for_service(
     assert len(results) == 1
     assert results[0].email_address == 'new@address.com'
     assert results[0].is_default
+    assert not results[0].archived
 
 
 def test_add_reply_to_email_address_for_service_creates_another_email_for_service(notify_db_session):

tests/app/dao/test_service_letter_contact_dao.py

@@ -39,9 +39,11 @@ def test_add_letter_contact_for_service_creates_additional_letter_contact_for_se
 
     assert results[0].contact_block == 'Edinburgh, ED1 1AA'
     assert results[0].is_default
+    assert not results[0].archived
 
     assert results[1].contact_block == 'Swansea, SN1 3CC'
     assert not results[1].is_default
+    assert not results[1].archived
 
 
 def test_add_another_letter_contact_as_default_overrides_existing(notify_db_session):

tests/app/dao/test_service_sms_sender_dao.py

@@ -58,6 +58,7 @@ def test_dao_add_sms_sender_for_service(notify_db_session):
     assert len(service_sms_senders) == 2
     assert service_sms_senders[0].sms_sender == 'testing'
     assert service_sms_senders[0].is_default
+    assert not service_sms_senders[0].archived
     assert service_sms_senders[1] == new_sms_sender